Gaastra, MI -- U.S. city in Michigan Population (2000): 339 Housing Units (2000): 164 Land area (2000): 1.646676 sq. miles (4.264870 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.646676 sq. miles (4.264870 sq. km) FIPS code: 31160 Located within: Michigan (MI), FIPS 26 Location: 46.059652 N, 88.605549 W ZIP Codes (1990): 49927 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gaastra, MI Gaastra